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Finding the Third Proportional to 8,730 and 13,215

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Solution

The third proportional to 8,730 and 13,215 is: 20,004.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,730 : 13,215 = 13,215 : x
  2. Step 2: Convert to fraction form
    8,730/13,215 = 13,215/x
  3. Step 3: Cross multiply
    8,730x = 13,215 × 13,215
  4. Step 4: Simplify right side
    8,730x = 174,636,225
  5. Step 5: Solve for x
    x = 174,636,225/8,730
  6. Step 6: Final answer
    x = 20,004.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.